Shuttle-shifting means for sewing machines



R. M. SHARAF SHUTTLE -SHIFTING MEANS Fori SEWING MACHINES Feb. 23 192s.1,574,122

originali Filed April 2, 1917 zvSneers-Sheet 1 .-Fb. 23,1926. Iixfmgzff:v

' R. M.- SHARAF.

SHUTTLE SI'IFI'ING MEANS-FOR SEWING MACHINES v Original Fild April 2,1917 2 Sheets-Sheet 2 Q 5 am Patented Feb. 23, 1926.

g asma Par Enr esrres. g

SHUTTLE-SHIETING MEANS -FOR SEYVNG MACHINES.

vilpplieaton filed April y2, 1917, :Serial N.o.I159,G.SO. Renewed.Noi/enmen, 1921. :Serial No. 512,571.

To all whom t 'may concern.'

Be it known that I, RALPH ,M. ,SrnmAna citizen ofthe .United States,anda resident of the borough of the Bronx, in the cityand State of NewYork, have .inventedicertain new and useful Improvements `inShuttletlhifting llleans for Sewing ,Machines, of which the following isa specification.

The present invention relates to improvements `in shuttle shifting.means for sewingl .machined and particularly `to an improved meansforthe adjustment-of such shuttles 1in sewing kmachines of thel twoneedle type, an object of the invention being to enable the convenientand accurate adjustment of the two shuttles,.and simultaneouslytherewith, the corresponding adjustment of thefeed dog-s, throat platesand shuttle operating means.

A further object ofthe invention is to provide such means which :will besimple andreliable in construction.

Vifith theseand other'objects in view, .an einbodimentof my invention isshown inthe accompanying drawings, and this embodi ment will behereinafter `more, ,fully described with reference thereto, and the.invention will be finally pointed out .in the claims.

In the accompanying drawings Figure 1 isa lplan view of the shuttle endof the base plate of the'sewing machine, showing the same embodiedtherein, and with the throat lplates removed;

yFigure 2 is a similar view, showing` the throat plates in place; Y

Figure 3 is `a vertical longitudinal sectional viewvalong the line 3 30f VFigure 1;

Figure 4.- is an end view;

Figure 5 isa vertical transverse sectional view along the line 5-5 ofFigurel;

Figures 6 and 7 are fragmentary view-s showing the method of adjustment;

Figure 8 is a section taken on the dine 8 8 of Figure 7;

Figures 9 and 10 `are plan views of the two retaining plates employed;and

Figures 11, 12, and 13 are detail views-of the auxiliary -`adjustingarms.

Similar reference characters indicate corresponding parts throughout theseveral figures of the drawings. l

Referring tothe drawings, fthefbase plate V10 yis `provided with ,ashuttle opening 11v t weach side of which 4extend longitudinal ridges.12 and between which and yupon the ledge formed .interiorly thereof aresli dably secured throat plates ltand c1.5,.iand `a removable ,fillerIplate 16. The means 4.toradjusting ftliese throat plates will behereinafter fmore fully lpointed rout.

.learilll' supports lil' and 1S extend downwardly fromthe'base plate 10,and a shuttle driving shaft 19 is supported inthem. A pinionrear 2O uponvthe endfofvthe shaft 119 is engaged'bya gear .21 ,providedupon the endAof a counter drive shaft22, rotated in any suitable nummer from `themain drive shaft. j .lvlitreggears 223. and Zlare pro vi ded upon theshaft 19, whichengage ,mitre n.earsQ and .QGcaVried :bythe shafts 27.and 25% of ,the

shuttle hooks orloopers 29ans? bt), mounted in the adjustable supportingsaddles'-ll and The ,gears ,23 `and ,.24 are `carried by sleevesStand-234i keyed tothe shaft 19 in such a manner asto `have,free.longitudinal movementthereon, and `to be rotated therew by.rtnnular groove reccssesl and 36 are .provided in the said sleeves 323and 3.4 to

`the base plate Upoirthe lower ends ofthe ybolts which extend beyondthe-ends ofthe sleevesthem vare @mounted two plates 53 and 54, said,plates being ,provided lat Veaeh -of the four corners ,thereof v'withholes 55 Yand 56 `respectively, through which .the threaded ends nuts57. `Theseretaining nutsare normally slightly loose so that, .unlessother xtightening meansare employed to force the sleeves 4:9, 50, 5.1andQ tightlyagainst the :flange 'fof `the. shuttle saddles, ,the saddles.are Y.free

to .move .lengthwise Vfor adjustment, .the slots #151, 42, .and Lily-l1,peri'nittug such movement. These .plates 53 vand 541 are of the bolts`protrude, to jreceive retaining' Y curved inwardly at their sides toreduce the materal employed therein. The plate 53 is provided at itsinner face with curved reenforcing ribs 58 and Y59 (Fig. 1,0), soarranged as topermit the movement of the mitre gears 23 and 24 withoutinterference therewith.' The plate 54 is `provided centrally with anenlarged port-ion 60, having a threaded opening` 61 therethrough, anddiagonal reenforcinfr ribs 62 extend therefrom to the corners of theplate. A set screw 63 engages the threaded opening 61, and is adapted tobear at its end against the upper plate 53. By turning this screwinwardly, it` will be seen the plate 53 is forced tightly against thesleeves 49, 50, 51 and 52, at the corners, lifting the same and therebysecuring the shuttle saddles tightly against the base plate, as clearlyindicated in Figure 6, thereby preventing .movement of the shuttlesaddles. W'hen the saddles are to be moved, it is only necessary toloosen this one set screw 63 without removal or adjustment of any otherpart, thereby loosening all of the sleeves, and the engagement of theshuttle saddles with the base plate permitting the ready movementthereof.

The throat plates 14 and 15 are made movable with the shuttle saddles bysecuring the same respectively to each of the said saddles by means ofscrews 64 which engage tapped holes 65 provided in .supporting blocks66, formed upon the upper surface of the shuttle saddles. The throatplates 14 and 15 are provided with open ings 67 and 63 r spectively forthe needles and the feed dogs, and between the inner adjacent edges ofthethroat platesthere is provided the removable. filler plate 16. beforereferred to. Said filler plates will be provided. in varying sizes to.lill the opening formed upon adjustment of the shuttle sad- Ydles andthroat plates in either direction.

Adjacent the throat plates 14 and 15, and also slidable between theridges 12 and 13, there are provided removable cover plates 69 and 70which may be removed when *desired to gain access to the shuttle.

rock shaft 71 having a concentric rock shaft 72 mounted therein, issupported at the front of thevbase plate, and at the rear thereof thereis provided a rock shaft 73.

lCrank levers-7 4 and 75 are mounted respecengagement therewith ofadjustment means hereinafter referred to. The rear ends of the feed barsare provided with slots 82 which slidably engage blocks 83 carried uponcrank levers 84 and 85, mounted upon the rock shaft 73, and keyedthereto ir such a manner as to permit free longitudinal movementthereof. These crank levers 84 and 85 are likewise provided withrecesses 86, 87 to permit t-he engagement therewith of the adjustmentmeans hereinafter referred to. The levers 74 and 7 5 it will be seen,impart the to and fro movement to the feed bars and the dogs carriedthereby, and t-he .levers 84 and 85 impart a lifting movement thereto.

Upon the inner face of the shuttle' saddle 31, there is secured by meansof screws 88 a plate 89, which carries at each side thereof arms 90 and91 respectively, these arm being bent rearwardly 'and forwardlyrespectively from the said plate 89. At the ends of the arms there areprovided yokes 92 and 93 respectively which engage the grooves 8G and 80of the levers 84 and 74 respectively.

The lower edge of the plate 89 is provided with a downwardly. extendingportion 94, having a yoke 95 which engages the groove 35 of the sleeve33, which carries the mitre gear 23. saddle 32 there is secured by meansof screws .96, a plate 97 having arms 98 and 99, provided at their endswith yokes 100 and 101 which respectively engage the grooves 87 and 81of the levers 85 and 75. This plate and arms which is shown in detail inFigure 12, is similar to that secured to the saddle 31, with theexception that the downwardly extending portions 94 and 95 are omitted.Upon the outer face ofthe saddle 32 there is secured/by means of screws102 a plate 103 having a downwardly extending portion 104 thereonprovided with a yoke 105, which engages the groove 36 of the sleeve 34carrying the mitre gear 24. It will thus be seen that upon movement ofthe shuttle saddles in either direction, the gears 23 and 24 arecorrespondingly moved, to-

gether with the throat plates, feeding dogs and the operating levers, sothat a complete adjustment takesplace by merely moving the shuttlesaddles.

In order to bring about the simultaneous and convenient moving of theshuttle saddles toward and away from each other after the same have beenloosened by means of the set screwy 63, 1 provide a screw 106 oppositelythreadedfrom the center, and passing through lugs 107 and 108 providedon the respective shuttle saddles 31 and 32. This screw 106 is securedcentrally thereof to a spiral gear 109, and. supported at its ends uponadjustable bearing screws 110 and 111 mounted in upwardly extendingbrackets 112 and 113 of a bracket frame 114, se-

To the inner face of the shuttle 1"' cured at its inwardly extendingends 115 plate being looselymovable on'saidbolts, :i

and "116 by screws l117 and 118to the bearing supports 17 and 18, Atubular bearing 119 is provided integrally of the said frame 114, inwhich is mounted a spindle 19.0 having a knurledhead 121 atits outerend, and provided at its inner end with aspiral gear 122 which mesheswith the spiral gear 109 of the screw v106. 'By turning the knurled head121 in either direction as desiredpthe shuttle saddlesit will be seen,may be simultaneously -and equally moved inwardly towards each other orout #ardly away from each otlieigdueto the opposite threading ofthe'screw 106, thereby bringing about an accurate and quick adjustmentof the entire shuttle and feed mechanism, including the throat plates.

rlhe bearing screws 110 and 111 permit of the accurate preliminaryadjustment of the screw 106 by means of a screwdriver or the like, saidbearing screws being provided with grooves for this purpose. Thisadjustment usually takes place in fixing up the machines at the factory,and is permanent thereafter.

"l have illustrated and described a preferred and satisfactoryembodiment of my invention,`but it is obvious that changes may be madetherein within Lthe spirit and scope thereof as defined inthe appendedclaims.

l claim:

1. An adjustment means for sewing machines, comprising a plurality oflooper hooks, saddles `therefor Ihaving slots, bolts supported by the`frame of the machinevpassing through the slots of the said saddles,V

means-on the said boltssupporting said saddles adjacent to the frame,said means permitting movement of said. saddles, and means fortightening the engagement of said last named means with said saddles tosecure the said saddles against movement.

2. Adjustment means for sewing machines, comprising a plurality oflooper hooks, a plurality vof saddles therefor having slots, boltssupported by the frame of the machine passing through the slots of thesaddles, sleeves on said bolts, a plate having openings through whichthe bolts pass, said plate being loosely movable on said bolts, a secondplate mounted on said bolts in spaced relation to said firstnamedvplate, and means in said second plate adapted to engage said iirstplate for tightening or loosening the engagement of said first platewith said sleeves to prevent or permit movement of said saddles.

3. Adjustment means for sewing machines, comprising a plurality oflooper hooks, a plurality of saddles therefor having slots, boltssupported by the frame of the machine passing through the slots of thesaddles, sleeves on said bolts, a plate having openings through whichthe bolts pass, said second `plate Ymounted on sai db'oltsiin spacedrelation to said firstnamed plate,ia set-screw in said second plateadapted to engagesaid first yplate :for tightening or loosening theengagement of Vs aid fir-st plate with vsaid tubular slots toprevent or`permit movement of said saddles. Y

l. Anadjustment means for sewing machines, comprising a plurality oflooper hooks, saddles therefor having slots, bolts supported by theiframe ofthe machine .and passing vthrough the slots of the saidsaddles, means on the said bolts 'supporting said saddles adjacent'tofthe frame, said means permitting movement of saidsaddles, and meanslfor tightening the engagement of said last fnamed means -with saidsaddles to secure the said saddles against moves ment-@means foroperating the looper hooks.

feed dogs, and means carried by Vsaid saddles adapted `to move saidoperating `means and `said feed dogs with the said saddles.

5. Anadjustment means Ifor sewing machines, comprising -a yplurality oflooper hooks, saddles therefor having slots, bolts supported by theframe of the n'iachineand passing `through the slots ofthe said saddles,means on the said bolts-supporting said saddles adjacent to the frame,said means permitting movement of said saddles, and means for tighteningthe `engagement of said last named means with said saddles to secure thesaid saddles-against movement, throat plates carried by said saddles andmovable therewith, and a'lller `plate adapted to be inserted incontacting relation 'between said throat plates upon theuvariableadjustment of said saddles.

6. Adjustment means for sewing man chines, comprising a plurality oflooperhooks, `looper saddles having slots, means for preventing orpermitting movement of said saddles, an oppositely threaded screw memberhaving its opposite threads respectively engaging said saddles, andmeans for rotating said screw member to move said saddles toward or fromeach other.

7 Adjustment means for sewing machines, comprising a plurality of looperhooks, looper saddles having slots, means for preventing or permittingmovement of said saddles, an oppositely threaded screw member having itsopposite threads respectively engaging said saddles, a spiral gearsecured to said screw member, andA means for rotating said spiral gearto rotate said screw member, rotation of said screw member being adaptedto move said saddles toward or away from each other.

8. In an adjustment means for sewing machines, the combination withlooper saddles, an oppositely threaded screw having its opposite threadsengaging the said saddles, means supporting the ends of said screw, aspiral gear on said screw, and means for rotating said spiral gear andsaidA screw, said supporting means for said screw being adapted to beadjusted to place the spiral gear in normal positionrwith respect to itsoperating means.

9. An adjustmentmeans for sewing machines, comprising a plurality `oflooper hooks, saddles therefor having slots, b olts supported by theframe of the machine and passing through the slots of said saddles,means on said bolts for supporting said saddles adjacent to the frame.said means permitting movement of said saddles, means for bringing thelast-named means into tight engagement with said saddles to hold thelatter against movement, throat plates carried by said saddles andmovable therevvith, and means adapted to till the gap between saidthroat plates upon the variable adjust-ment of said saddles.

l0. An adjustment means for sewing machines,l comprising a looper, asaddle therefor having a slot, a bolt secured to the frame of themachine and extending through said slot, means on said bolt adapted forloose engagement With said saddle to permit adjustment thereof, andmeans for bringing said .first-named-means into tight engagement withthe saddle to secure it against movement.

ll. An adjustment means for sewing machines, comprising a looper, asaddle therefor having a slot, a stationary bolt extending through andbeyond said slot, a sleeve on the projecting portion of said bolt,adapted for loose engagement with said saddle to permit adjustmentthereof, and means for forcing said sleeve into tight engagement Withthe saddle to secure it against movement.

l2. An adjustment means for sewing machines,comprising a looper` asaddle therefor having a slot, a stationary bolt extending through andbeyond said slot, a sleeve on the projecting portion of said bolt,adapted for loose engagement With said saddle to permit adjustmentthereof, an abutment on the side of the sleeve opposite to that on whichthe saddle is located, a clamping member located on the-bolt between thesaid abutment and the sleeve, and a pressureexerting connectionbetiveensaid abutment and the clamping member to force the sleeve into tightengagement With the saddle to secure the latter against movement.

13. In a sewing machine, two throat plates mounted to be adjusted towardand from each other, and a filler plate adapted to bey inserted incontacting relation between said throatplates upon a particularadjustment of said plates.

l-I. An adjustment means for sewing machines, comprising a plurality oflooper hooks, saddles therefor having sliding relation with the frame ofthe machine, a plurality of means supporting said saddles adjacent tothe frame and permitting sliding movement thereof, and singular meansadapted to cooperate With said plurality of supporting means to tix saidsaddles relatively to said frame against movement.

In testimony, that I Claim the foregoing as my invention, I have signedmy name.

RALPH M. SI-IARAF.

